Difference between revisions of "Electrical resistance"
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| − | '''Electrical resistance''' is a measure of how much a substance impedes the flow of [[electrons]].<ref>http://www.answers.com/topic/electrical-resistance-1</ref> Resistance is represented with the symbol ''R'', | + | '''Electrical resistance''' is a measure of how much a substance impedes the flow of [[electrons]].<ref>http://www.answers.com/topic/electrical-resistance-1</ref> Resistance is represented with the symbol ''R'', and its [[SI]] unit is the [[Ohm]] (Ω). |
Resistance is in a circuit can be calculated by the [[voltage]] divided by the [[current]] (R = V / I). | Resistance is in a circuit can be calculated by the [[voltage]] divided by the [[current]] (R = V / I). | ||